Form clamp



Nam 25, 1924.

1,51 6,7 77 w. H. MEssAcAR FORM CLAMP.'

Filed Nov. 24, 192.

/LLL

Patented Nev. 25, 1924.

WILLIAM H. MESSACAR, OF DETROIT, MICHIGAN.

FORM

CLAMP.

Application filed November 24, 1922. Serial No. 602,935.

l 1o all whom t may concern Be it known that I, VILLIAM H. MnssAcAR, a citizen of the United States, residing at Detroit, in the county of lNayne and State of ldichigan7 have invented a new and useful Improvement in a Form Clamp, of which the following is a specification.

My invention relates to a new and useful improvement for a form clamp and has for its object the provision of a form clamp which will be simple in structure, economical of manufacture and highly etticient in use.

The invention is adapted for use as a clamp for binding together the walls of forms used in the building t 'ade and alfords means of holding the walls of a form in position after the proper assembling of them and of bringing the walls into such close relation with each other as to prevent any spreading of the same when in use. The construct-ion of the invention is such that it may be tightened upon the form after being assembled thereon. Provision is made in the invention for maintaining the binding members of the clamp in tightened position relatively to the form during the operation which brings about a permanent fastening of the binding members. This tightening of the form clamp about the form is so brought about in the present invention as to permit the fastening of the clamp upon the form, and the subsequent tightening of the same by one operator, thus dispensing with the services of a second operator, as is the case in such devices as are now in use. A further feature of the present invention is the preventing of a slipping of the clamp on the form during the tightening process, thus permitting the clamp to be more securely adjusted about the form even after use of the same has been begun.

Another object ofthe invention, therefore, is the provision of a form clamp having means for binding the clamping members in adjusted position preliminary to the permanent fastening of the same.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter' described and claimed.

The invention will be bestunderstood from a reference to the accompanying drawings which form a part of this specifica.a tion and in which,

Fig. 1 is a top plan View of the invention shown applied to a form which is shown in. cross section,

Fig. 2 is a fragmentary sectional view taken on substantially line 2 2 of Fig. 1,

Fig. 3 is a perspective view of one of the binding members used in the invention,

Fig. 4t is perspective view of the lever used with the invention,

The preferred form of the invention comprises arms 7, each of which is provided with an eyclet or passage 9 formed in a head which is mounted on one end of the arm, the eyelet 9 being sufficiently large to receive one of the arms 7 and slightly larger in width than the arms so as to allow for a little play of the arm, transversely, in the eyelet. Formed in one of the side walls of the head 8 is a threaded opening 10 which is adapted to receive the threaded end of a stud 11.

Each of the arms 7 is provided adjacent the end on which is carried the head 8 with a notch providing an inclined surface 12 and a shoulder 18. In use the arms are assembled in the relation shown in Fig. 1 and when thus assembled it will be noted that the arms are adjustable transversely and longitudinally, sliding in the eyelets. Then mounted in this position thev are caused to surround the walls 14, 15, 16, and 17 which constitute the form. These side walls are generally assembled in loose relation, the arms i' serving to tain them in assent bled position. Vhen the side walls are brought closely together the arms may then be fastened in clamping relation thereabeut by means of the set screws 11. To bring the arms into tight engagement with the sidewalls of the form I have provided a tightening lever which comprises a hook portion 18 at one end thereof, projecting from which is a portion 19 having an elongated slot 20 formed therein. Projecting from the portion 19 is an angularly turned portion or arm 21. clamp the walls more closely together the hook portion 18 is engaged in the notch so as to bring the hook end into engagement with the shoulder portion 13. rFhe projecting end of arm 7 which passes through the evelet adjacent the notch used projects through the slot 20. By exerting pressure on the arm or handle 21 so as to press the same inwardly toward the form a pressure is exerted on the head 8 directed longi- `When it is desired to tudinally of the arm 7 projected therethrough, thus tending to move the arms closer in toward each other and securely clamping the Walls of the form into closer relation. As the pressure is applied to the arm or handle 2l the head 8 engaged by said lever iS forced longitudinally' of the arm passing therethrough and the arm is moved relatively to the head inwardly to Ward the form, so as to bind this arm and the head. The relative movement of this arm and the head Will of course be slight before the tvvo members bind together because of the friction between each other. When the members are thus bound together the operator Without relieving the pressure on the arm Q1 may then tighten the setscreiv so as to bind the parts together and lock them in this adjusted position. In this Way very little pressure Will be exerted on the set screw until it is firmly screwed down7 thus preventing any slipping of the parts during the tightening process. The operator, in making the proper adjustments, Will perform the same function at each corner.

It is appare-nt that the clamp may be used for various sized forms Within its limit, and the length of the arms may be left optional With the one making them. rlhe device also afforos clamping arms or members which are capable of adjustment in tivo directions, which are termed transversely7 and longitudinally in the specification.

While l have illustrated and described the preferred form of construction I do not Wish to limit myself to the precise form of structure shown but desire lto avail myself of such variations and modifications as come Within the scope of the appended claims.

Having thus described my invention whatv I claim as new and desire to secure by Let ters Patent is:

l. A form clamp comprising a plurality of clamping bars, each of said bars being adjustable longitudinally of one member and transversely of the other, when in op erative relation to each other; a head carried by each of said members adjacent Vto and integral with one end; said head being provided with an opening for the reception of one end of a cooperating bar, the Walls of said head being uninterrupted, one of said Walls having a threaded opening formed therein; and a set screw adapted for threadingin said opening for binding a pair of said bars in fixed relation to each other.

2. A form clamp comprising a plurality of clamping bars, each of said bars being adjustable longitudinally of one member and transversely of the other, When in operative relation to each other; a head carried by each of said members adjacent to and integral With one end; said head being provided with an opening for the reception of one end of a co-operating bar, the walls of said head being uninterrupted, and separable means for engaging one of said bars at tivo longitudinally spaced points, for forcing the slotted end of said bar longitudinalbv of an adjoining bar.

8. A form clamp comprising a plurality of clamping bars, each of said bars being adjustable longitudinally of one member and transversely of the other, When in operative relation to each other; a head earried by each of said members adjacent to and integral With one end, said head being provided With an opening for the reception of one end of a co-operating bar, the Walls of said head being uninterrupted, and separable means for engaging one of said bars at tivo spaced points for forcing the slotted end of said bar longitudinally of an adjoining bar; said means being adapted under pressure for binding said bars in fixed relation to each other after movement through a predetermined distance.

et. A form clamp comprising a plurality of clamping bars, each of said bars being adjustable longitudinally of one member and transversely of the other when in operative relation to each other: a head carried yby each of said members adjacent to and integral with one end; said head being provided with an opening for the recej'ition of one end of a (ro-operating bar, the walls of said head being` uninterrupted: and sepa rable means for engaging one ot said bars intermediate its end, and also at its headed end for forcing the headed end of said bar longitudinally of an adjoining bar.

ln testimony whereof I have signed the foregoing specification at Detroit, in the county of ldlayne and State of Michigan.

TLLIAM H. MESSACAR. 

